LEGO City Undercover retail packaging says internet connection required, 13GB required for "game download"

I don't know about you, but this seems confusing as hell to me. If you're buying the retail edition of LEGO City Undercover on Switch, it seems you'll still need to download 13GB worth of data. On top of that, the box says an internet connection is required. Is this for the 13GB download, or the entire time you play? Why is such a big download needed for the retail version? Furthermore, the eShop version of the game is roughly 7 GB, so you'll most likely have to download the 13GB patch after that!

from GoNintendo